6.5-47 Lapua Seating Depth

NV,

I have absolutely no doubt their is a faster difference in the ballistics of any bullet over long range distances due to higher altitude/reduced barometric pressure. I just don't know what to say about the velocity being higher between the muzzle and a chronograph, 10-15' away. I think I'm having a hard time wrapping my brain around that one.

Alan
 
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